Home / 20,300.81-28,015.03-11,348.30

Finding the Fourth Proportional to 20,300.81, 28,015.03 and 11,348.30

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Solution

The fourth proportional to 20,300.81, 28,015.03 and 11,348.30 is: 15,660.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,300.81 : 28,015.03 = 11,348.30 : x
  2. Step 2: Convert to fraction form
    20,300.81/28,015.03 = 11,348.30/x
  3. Step 3: Cross multiply
    20,300.81x = 28,015.03 × 11,348.30
  4. Step 4: Simplify right side
    20,300.81x = 317,922,908.21
  5. Step 5: Solve for x
    x = 317,922,908.21/20,300.81
  6. Step 6: Final answer
    x = 15,660.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.